| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of reducing ambient gas entrainment into plasma and ion current noise associated with plasma based spectrometry.SOLUTION: A method for producing sample atoms comprises: generating plasma 228 in a plasma torch 204 comprising a torch exit 216 coaxial with a torch axis 208; discharging the plasma from the torch exit into a chamber 212 along the torch axis, through an aperture 280 of a baffle 276 in the chamber, and toward a chamber wall 220 that at least partially defines the chamber, where the baffle is positioned at an axial distance from the chamber wall effective for suppressing annular vortex shedding in the discharged plasma; and injecting the sample into the plasma.SELECTED DRAWING: Figure 2 |
